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Author SHA1 Message Date
Max Kazantsev 2cb3653404 [SCEV] Re-enable "Cache results of computeExitLimit" 
The patch rL309080 was reverted because it did not clean up the cache on "forgetValue"
method call. This patch re-enables this change, adds the missing check and introduces
two new unit tests that make sure that the cache is cleaned properly.

Differential Revision: https://reviews.llvm.org/D36087

llvm-svn: 309925
 2017-08-03 08:41:30 +00:00
Sanjoy Das 843ab57457 Revert "[SCEV] Cache results of computeExitLimit" 
This reverts commit r309080.  The patch needs to clear out the
ScalarEvolution::ExitLimits cache in forgetMemoizedResults.

I've replied on the commit thread for the patch with more details.

llvm-svn: 309357
 2017-07-28 03:25:07 +00:00
Max Kazantsev f282aed428 [SCEV] Cache results of computeExitLimit 
This patch adds a cache for computeExitLimit to save compilation time. A lot of examples of
tests that take extensive time to compile are attached to the bug 33494.

Differential Revision: https://reviews.llvm.org/D35827

llvm-svn: 309080
 2017-07-26 04:55:54 +00:00